Computers generally include three parts: boot, infection and performance?

Computer "virus" generally includes three parts: guidance, infection and performance. A computer virus is a set of computer instructions or program codes that the compiler inserts into a computer program to destroy computer functions or data, affect the use of the computer, and replicate itself; it is contagious, concealed, infectious, latent, and can Provocative, expressive or destructive.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Computer "virus" generally includes three parts: guidance, infection and performance.

Computer Virus is a set of computer instructions or program codes that the programmer inserts into a computer program to destroy computer functions or data. It can affect the use of the computer and can replicate itself.

Computer viruses are contagious, covert, infectious, latent, excitable, expressive or destructive. The life cycle of a computer virus: development period → infection period → incubation period → attack period → discovery period → digestion period → extinction period.

• Computer viruses can be divided into three types according to the classification of existing media: boot viruses, file viruses and hybrid viruses;

• Click on the link Method classification can be divided into three types: source code viruses, embedded viruses and operating system viruses;

• According to the system classification of computer virus attacks, it is divided into viruses that attack DOS systems and viruses that attack Windows systems Viruses, viruses that attack UNIX systems.

Today’s computer viruses are constantly introducing new ones, including some unique new viruses that cannot be classified according to conventional types for the time being, such as Internet viruses (spread through the network, some carry viruses (increasing amounts of data), email viruses, etc.

Transmission route:

Computer viruses have their own transmission modes and different transmission paths. The main function of the computer itself is its own replication and propagation, which means that computer viruses can spread very easily, and viruses can usually be spread in an environment where data can be exchanged. There are three main types of computer virus transmission methods:

(1) Virus transmission through mobile storage devices: U disks, CDs, floppy disks, mobile hard disks, etc. can all be paths for spreading viruses, and because they often are moved and used, so they are more likely to be targeted by computer viruses and become carriers of computer viruses.

(2) Spread through the Internet: The network methods described here are also different. Web pages, emails, QQ, BBS, etc. can all be ways for computer viruses to spread online. Especially in recent years, with the advent of network technology, With the development of the Internet and the operating frequency of the Internet, the speed of computer viruses is getting faster and faster, and their scope is gradually expanding.

(3) Spread by exploiting the weaknesses of computer systems and application software: In recent years, more and more computer viruses have spread by exploiting the deficiencies of application systems and software applications. Therefore, this approach is also classified as a basic category of computer viruses. in the mode of communication.

Expand knowledge:

Computer viruses are recognized as the number one enemy of data security. Since 1987, computer viruses have received widespread attention around the world. In 1989, our country also Computer viruses were first discovered in 2006. Currently, new viruses are developing in directions that are more destructive, more secretive, have higher infection rates, and spread faster. Therefore, it is necessary to learn the basic knowledge of computer viruses in depth and strengthen the prevention of computer viruses.

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